Levi Johnston opens up to GMA about the split and fatherhood.
Johnston sees his son regularly and described how becoming a father had changed his life.
"I'd give anything for [Tripp], to be with him," he said. "[There are] a lot of changes when you're a father, when you hold him for the first time, you know. I don't do a lot of things I used to anymore, I'll tell you that."